A device for detection of bursts of clinical recurrent in a television signal of a multiplex, 1984, - analog.

摘要

The detection device of the location of bursts, applicable to the mac / packet signal receivers, comprises means (12) for detecting transitions and for detecting the presence of a sequence comprising successively a period of time equal to n1 t1 during which have been observed with the transitions at intervals of not more than n2 t1 and a period of a duration at least equal to n3 t1 without transition. They emit a pulse at each detection (t1 being a determined time interval, of the same order of magnitude as the period of bits). The validation means (22 - 40) count the pulses emitted during a time window which is mounted on the first pulse, for a duration greater than that of the useful lines of a frame and verify that the number of pulses is greater than a predetermined value.